Ihave a head but no body, a heart but no blood. just leaves and no branches, i grow without wood. what am i?

Is this a riddle? I think it is a lettuce vegetable!

The correct answer for this would be a LETTUCE. A lettuce has a head and this is the part of the lettuce that is popular. It has a crisp-head variety with solid hearts and crisp, tasty leaves.  Head lettuce, also known as iceberg lettuce, is a dense rosette of leaves that forms a tight ball about the size of a human head.  Hope this answer helps.

The correct answer is: a fluorescent